690986041 has 2 divisors, whose sum is σ = 690986042. Its totient is φ = 690986040.

The previous prime is 690986011. The next prime is 690986059. The reversal of 690986041 is 140689096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408040000 + 282946041 = 20200^2 + 16821^2 .

It is a cyclic number.

It is not a de Polignac number, because 690986041 - 2⁷ = 690985913 is a prime.

It is not a weakly prime, because it can be changed into another prime (690986011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345493020 + 345493021.

It is an arithmetic number, because the mean of its divisors is an integer number (345493021).

Almost surely, 2^690986041 is an apocalyptic number.

It is an amenable number.

690986041 is a deficient number, since it is larger than the sum of its proper divisors (1).

690986041 is an equidigital number, since it uses as much as digits as its factorization.

690986041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 690986041 is about 26286.6133421557. The cubic root of 690986041 is about 884.0763197384.

The spelling of 690986041 in words is "six hundred ninety million, nine hundred eighty-six thousand, forty-one".